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Notes from Regional Strategic, Ltd.

The Coming Depopulation

The Recovering Economist and Growth

I am a recovering economist. I spent most of my adult life with production functions, growth models, economic impact studies, and such. Traditional economic practice and the concepts of progress it embodies assume things grow. Sure, there are recessions. There are depressions. There are areas of the world that stagnate and decline. Those, however, are aberrations. They are failures of individuals or small groups of people. They grow out of market failures that can be identified and cured. At least, that’s the theory…

While we studied the concept of scarcity when we learned price theory in introductory microeconomics the production functions in upper-level micro seldom have explicit limits. It is assumed that individual players are too small to affect total supply or demand, so individual players appear to have an unlimited supply of resources at their disposal. It is only a small conceptual jump for most of us – even those of us who are economists – to internalize the assumption that the resources of production are unlimited.

Input-output systems utilized in economic impact modelling explicitly assume unlimited linear production relationships. It is possible in the context of these models to define an economic event that will employ an additional 10,000 workers in areas having populations of less than 10,000. The model will dutifully crank out an impact to scale (for a quick look at some of the implications of this, see my blog post at Regional Strategic, Ltd.

Beyond economic impact modeling, whenever we perform cost-benefit analysis looking forward, we discount future costs and benefits on the basis of some factor (generally an assumed future interest rate). The effect of this is that current benefits nearly always swamp future costs. Future costs approach zero the farther out we look because the discount rate reduces them at a geometric rate. In a world of limited resources, one might think that future costs should approach infinity as we run out of valuable stuff to consume, but that is not how we model the future. Our modeled perceptions are probably some distance from our grandchildren’s coming realities. 

The Coming Depopulation

These ubiquitous assumptions of continuous growth are running headlong into the reality of worldwide population decline. This is not the Malthusian catastrophe or Paul Ehrlich’s population bomb. It is not due to famine or war ignited by overpopulation, poverty, and despair. The simple fact seems to be that as people around the world are getting better off they are having fewer children. 

This reinforces theories of economic demography which suggest that in poor societies children are demanded as a form of insurance against illness, injury, and incapacity. Where infant and child mortality are high, this generates a substantial demand for more children as a hedge against both poverty and mortality. On the other side of the coin, in rich societies with low infant and child mortality and significant insurance infrastructures, the increased demand for children is channeled into quality rather than quantity. In this sense, children in rich societies are acquired much like luxury durable goods – why have a Chevrolet when you can have a Mercedes? Fewer children have greater opportunities to participate in elite sports or arts groups, get more prestigious educations, and, later in life, receive larger inheritances. This increases the status of their parents as an exclusive cadre of exceptional children is paraded about town.

This, to varying degrees, increasingly appears to be the situation around the world, at present. For individual families and children, it is a favorable development. Society wide, perhaps, not so much.

Worldwide population decline has not been experienced since the 14th century when the great famine and the bubonic plague savaged the known world in quick succession. That episode, however, generated substantially different demographic effects than we can expect from the current depopulation of choice.

The famine and the plague inevitably victimized weaker segments of the population – likely the elderly and the infirm – at greater rates than they affected the stronger. As population declined, the working-age population increased relative to other population segments. This increased the productive potential of the population that remained. As total population declined, it also bid up the wages of the working population that remained. Finally, because they inordinately victimized the elderly, the twin catastrophes accelerated intergenerational transfers of wealth.

As a result, the famine and the plague increased the productivity of the remaining population and redistributed wealth towards the working portion of the population. It is quite likely that the rapid population and wealth redistributions of the 14th century were substantial factors in the coming of the renaissance in the 15th and 16th centuries. In other words, increasing the proportion of the productive labor supply in the population and increasing the proportion of society’s resources available to that productive labor supply helped usher in two centuries of phenomenal economic innovation and growth.

The coming depopulation of choice will have very different ramifications. The coming depopulation will be the product of millions of decisions to have fewer children. That will mean fewer people entering the labor force. At the same time, increasing life expectancies will result in an increasing number of older people who have left the labor force. Unlike the 14th century situation in which the relative size of the working-age population increased and the relative size of the elderly population decreased, in the coming depopulation there will be an increasing proportion of elderly matched against a decreasing labor force.

Increasing the relative size of the elderly population can also be expected to decrease the resources available to the working-age population for two reasons. First, it will be necessary to commit an increasing share of output to a population that is no longer productive. Second, as people live longer, the intergenerational transfer of wealth slows. When people die at 50, inheritances accrue to people who are 30 and improve the lives of the dependent children of those beneficiaries. On the other hand, when people die at 80, the inheritances accrue to people who are 60 and will be held by those beneficiaries to support their coming unproductive years.

In the coming depopulation, we can expect the remaining population to become less productive because of the resulting age distribution and the reduction in resources that can and will be dedicated to support the productive portion of that population.

The Current Situation

In affluent countries, where life expectancies are high and premature death rates low, the replacement birth rate is approximately 2.1 children per adult female. This replaces two parents and accounts for pre-adult mortality. In less affluent countries, where pre-adult mortality rates are higher, the replacement rate must also be higher. In 2022, fertility rates in every region of the world except Africa, the Middle East, and Central and South Asia were below affluent-society replacement rates (2.1 children) and falling. Even the fertility rates in regions above the replacement level are falling. With the exception of Sub-Saharan Africa, fertility rates are below 3.0 for all of the above-replacement regions.

The population in China is already falling. East Asia as a whole has a fertility rate of only one-half the replacement level. The fertility rate in India is already below the replacement rate, as is true of all four of the world’s most populous countries (India, China, the United States, and Indonesia). While these trends are increasingly becoming the subjects of attention, they have been recognizable in every region of the world since at least the 1960s.

The United States is not experiencing depopulation. Fertility in the United States, at 1.6 births per female, is far below replacement levels, but strong immigration supports continued growth in the United States population. On the basis of current trends, the United States will continue to have an increasing population until about 2080, but current trends are largely dependent upon immigration.

As outlined in the previous section, the coming depopulation will be accompanied by significant aging in the population. Over the past 30 years, the proportion of the population over the age of 65 has increased by about 15 percentage points in East Asia, 10 percentage points in the European Union, and 5 percentage points in the United States. At varying rates, this trend is occurring in every region of the planet.

As the elderly live longer, working-age people move into the ranks of the elderly, and low birth rates fail to replenish the labor force, fewer and fewer productive people will be supporting larger and larger unproductive populations. In addition, as the elderly live longer, intergenerational transfers of wealth will slow and will become almost entirely transfer cycles within a multigenerational elderly population – continually concentrating resources within the ranks of the unproductive population.

The two demographic solutions to this are higher fertility and accelerating elder mortality. Neither of these appear to be on the horizon anywhere in the world.

Potential for Immigration and Replacement

In spite of sub-replacement fertility, the United States still experiences population growth due to strong levels of immigration. This immigration is driven by the need for labor force replacement in the United States coupled with a positive wage differential between the United States and the immigrants’ home countries.

These two factors are in place throughout the Western industrialized world. While Europe is increasingly concerned about immigration, Europe needs immigration to support its labor force. Hostility towards European Union immigration rules was a major instigator driving the Brexit movement, but Great Britain still needs to fill the labor gaps generated by an aging population with a declining labor force.

The wage differential between the United States and the undeveloped areas of the world (particularly Latin America) all but guarantees immigration, legal or illegal, into the United States. The same is true for Western Europe, particularly with respect to the Middle East and Africa. No nation has ever been able to stop economically driven immigration. In fact, dedicating significant resources in the attempt to stop such immigration will almost certainly exacerbate the internal labor force issues that are the major drivers of immigration in the first place. At best, nations can hope to shape the quality and quantity of their immigrant packages through carefully integrating national entrance and foreign policies.

A major issue with the labor force needs of the developed world is the skillset of immigrants from areas of the world with surplus populations. In an increasingly technical world, labor force needs will require immigrants with substantial skills. In contrast, it is estimated that 90 percent of young people in Sub-Saharan Africa and India, the two largest pools of remaining non declining population in the world, lack basic skills. To a lesser extent, this is also true of Latin America, the Middle East, and the rest of South Asia. These people are drawn to the labor shortages and wage differentials of the developed world, but they are not equipped to contribute at the levels required. The immigrant labor the developed world desperately needs is woefully educationally deficient.

What the Situation Requires

At its base, a solution to the problems that will accompany global depopulation and aging must revolve around increasing economic productivity. This is such an urgent need that the September 2024 issue of the International Monetary Fund’s Finance & Development publication is titled, “PRODUCTIVITY and how to revive it.” As smaller and smaller populations of productive people are left to support the needs of larger and larger unproductive aging populations, we will need to either generate increased levels of output from the productive population or succumb to decreasing standards of living for the population as a whole.

There are basically three means of increasing productivity:

  • Increase the availability of resources.
  • Increase the technical ability to transform those resources into goods and services that generate income and wealth.
  • Increase the skills of the population engaged in resource transformation.

The first of these offers, at best, limited potential. Having treated resource availability as infinite for over three centuries since the industrial revolution, the world’s available resources are becoming harder and harder to locate, develop, and acquire. In fact, the world is dedicating increasingly large shares of the second and third factors of increased productivity to the acquisition of the first. It is not a zero-sum game, but diminishing returns are certainly a reality.

The second requires investments in basic research that almost certainly will have to come from public initiatives. Private entities will willingly invest in the specialized research and development needed to bring marketable products into production. They will not, however, invest in the basic research and scientific progress that underpin their specialized research activities. Basic research results in knowledge available to any private entity. An individual corporation cannot engage in basic research because the successful results of that research do not accrue specifically to the corporation. The results might actually give competing corporations an edge in the marketplace.

Without public investment, basic research falters. Without basic research, productivity falters.

Unfortunately, in both North America and Western Europe, the cores of the world’s basic research infrastructure, levels of funding for basic research are falling. The public appetite for funding basic research through the expenditure of tax revenues has diminished. As a result, it will be very difficult to significantly increase the efficiency with which we transform resources into income and wealth as the world depopulates and ages. This does not augur well for the future.

In addition to funding, increasing basic research capabilities requires maintaining and improving the quality of students entering the various fields of basic research. This fits hand in hand with the third means of increasing productivity: increasing the skills of the population engaged in the transformation of resources.

Both the second and the third means of increasing economic productivity require continuous improvement in basic education. This should drive increasing commitments to and investments in education. As the working-age population diminishes, it is absolutely necessary that the skillset of the working-age population expands. This is immediately true in the developed world, where populations are aging rapidly, and working-age populations are shrinking rapidly. It is also necessary in the less developed world, which will inevitably be asked to replenish the shortfalls in developed nations’ productive workforces.

Unfortunately, public investments in education are also in decline in the United States and across Western Europe. The simple truth is that all three of the necessary components for increasing productivity and maintaining incomes in a depopulating and aging world are going in the wrong direction in the only areas of the world with the resources to improve them.

It gets worse. Even if the developed world invests in domestic education and research to improve productivity, it is almost certain that domestic productivity cannot be raised fast enough. The rapid declines in productive populations juxtaposed against the rising economic needs of an expanding elderly population will almost certainly outstrip even extraordinary productivity improvements. Additionally, the ability to raise the productivity of what are already the highest productivity populations in the world will be limited.

The simple fact of the matter is that maintaining income and wealth for the developed world will require augmenting the developed world’s labor force with imported labor, immigrants. In a world where most available immigrants lack the basic skillsets to be productive participants in a technical industrial and service economy, those skills will have to be improved before they immigrate.

This will require the developed world to invest in the educational advancement of less developed nations which can provide immigrants. This will have to be done by developed nations for two reasons. First, less developed nations simply cannot afford to upgrade their educational systems and human capital fast enough to address the immigration requirements of depopulation and aging in the developed world. Second, educating potential immigrants from the less developed world, like basic research discussed above, will not generate value that the host countries can directly capture. In fact, the very premise, here, is that the people educated will migrate from their less developed home countries to the developed world.

If they desire to maintain their income levels in the face of depopulation and aging, developed countries will have to invest heavily in improving both their own education and human capital development systems and education and human capital development in the less developed world. In addition to maintaining their own income levels, this will have an impact on improving income levels for the world as a whole.

Not all newly educated youth in the less developed world will migrate out. That will improve the productive human capacity of their home countries. It can also be expected that a substantial proportion of the immigrants to developed countries will remit earnings to their home countries. This may not sound familiar, but it has parallels to the situation discussed above concerning the twin catastrophes of the 14th century. By increasing the productivity of the workforce in less developed countries and providing additional capital to that workforce (through both external investments in education and emigrant remittances), we might create conditions for at least some of those less developed countries to take off.

Conclusion

The coming world depopulation appears to be set in stone. Over half of the people in the world live in countries where fertility rates fall below replacement rates. All four of the most populous nations in the world (India, China, the United States, and Indonesia) fall within this group. Only three broad regions on Earth have fertility rates above the replacement level: Africa, the Middle East, and South Asia. Fertility rates are falling in every nation on Earth, even in countries where fertility remains above replacement levels.

Depopulation due to declining fertility rates inevitably means populations will age significantly. Rising proportions of elderly people juxtaposed against declining productive populations will result in declining incomes unless rates of economic productivity increase substantially.

The central component to increasing economic productivity is education. Maintaining income levels in the coming depopulation will require an immediate commitment to increase investments in education. This will be necessary but not sufficient in the developed world. It is also imperative that the developed world make an immediate commitment to increase educational investments in less developed countries. This is necessary because the developed world will be dependent upon technically proficient immigrants to augment its labor force as its populations shrink and age.


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